Better understanding of link between weather, disease vital

Grandma’s advice to wear a sweater to prevent catching a cold may be supported by science, as evidence linking extreme hot and cold weather with human illness and death is growing.

For example, a 2016 study of Ontario residents published in the Canadian Medical Journal confirmed that more people die during and immediately after extremely cold weather than during average temperatures.

Specifically with influenza, there is a long-established link between fall and winter seasons and this respiratory infection.